#include<stdio.h>
int main()
{
	char cGrade;
	printf("Please enter your enter\n");
	scanf("%c",&cGrade);
	printf("Grade is about:");
	switch(cGrade)
	{
		case'A':
			printf("90~100\n");
			break;
		case'B':
			printf("80~89\n");
			break;
		case'C':
			printf("70~79\n");
			break;
		case'D':
			printf("60~69\n");
			break;
		case'F':
			printf("50~59\n");
			break;
		default:
			printf("your enter the char is wrong");
			break;
				}
				return 0;
}
